cells: prokaryotes vs. eukaryotes · cells: prokaryotes vs. eukaryotes! cells have evolved two...
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Cells: Prokaryotes vs. Eukaryotes!
Cells have evolved two different stuctures:!
Prokaryote & Eukaryote!
Prokaryotes
Bacteria
Archaea
Eukaryotes
Animals
Plants
Pro5sts
Fungi
Ex: E.coli and Salmonella!
Ex: Red Algae!
Ex: Yeast and Mushrooms!
Prokaryotes!
• Most are bacteria!
• VERY small!!
• Single-celled (unicellular)!
• NO nucleus (loose strands of DNA)!
These are prokaryotic !E. coli bacteria on the head of a steel pin.!
Structures in Prokaryotic cells!
• cell membrane: surrounds the cell!
• cytoplasm: inner liquid filling!
• DNA in one big loop!• Flagellum: helps cell move!• ribosomes: for building
proteins!NO NUCLEUS!! All of these structures found
in eukaryotes too!!
Prokaryote Energy!
• Different types of Prokaryotes get energy different ways!– Photosynthesis (Autotrophic)!
– Pathogenic – feed on living things !• The kind that make you sick!!
– Decomposers – feed on dead things!
Eukaryotes!
• Have organelles!
• Larger and more complex!
• Have a nucleus (where DNA is kept!)!
• multicellular (more than one cell) or unicellular!
• Include animal and plant cells!
Eukaryotes have Organelles!• ORGANELLE – membrane-bound cell part!
• Mini “organs” that each have a special job to do!
• Located in cytoplasm!
Two Main Types of Eukaryotes!
• Animal Cell!" Plant Cell!
All eukaryotes keep their DNA in a nucleus!
Eukaryotic Cell Specialization!• The whole cell can be specialized for
one job – this is how we can form multicellular organisms!!
!Ex: Sperm Cells specialized to deliver DNA to egg cell!
!Ex: Red blood cells - specially designed to carry oxygen throughout the body!
• WRITE YOUR SUMMARY!